An efficient synthesis of the title compounds in high enantiomeric purity (>98%) involves bromination under photolytic conditions of (2S)- or (2R)-oxazolidinones derived from (S)-alanine followed by treatment of the products with sodium iodide in refluxing acetone. A room-temperature single-crystal X-ray study of (2S,4Z)-N-benzoyl-4-bromomethylene-2-t-butyloxazolidin-5-one is recorded.
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页码:1425 / 1430
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YOSHIMURA J, 1972, B CHEM SOC JPN, V46, P2850